Southwestern Puerto Rico out 10NM Marine Forecast
| Rest Of Tonight...East Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: North 2 Feet At 8 Seconds. |
| Friday...Northeast Winds Around 5 Knots, Becoming North In The Afternoon. Seas Around 2 Feet. Wave Detail: North 2 Feet At 9 Seconds. |
| Friday Night...East Winds 5 To 10 Knots. Seas Around 2 Feet. Wave Detail: North 2 Feet At 9 Seconds And East 1 Foot At 4 Seconds. |
| Saturday...Southeast Winds Around 5 Knots. Seas Around 2 Feet. Wave Detail: North 2 Feet At 8 Seconds. Scattered Showers In The Afternoon. |
| Saturday Night...East Winds Around 5 Knots, Increasing To 5 To 10 Knots After Midnight. Seas 2 To 3 Feet, Occasionally To 4 Feet. Wave Detail: East 2 Feet At 5 Seconds And North 2 Feet At 8 Seconds. Scattered Showers. |
| Sunday...East Winds Around 5 Knots. Seas 2 To 3 Feet, Occasionally To 4 Feet. Wave Detail: Southeast 2 Feet At 5 Seconds And North 2 Feet At 8 Seconds. Scattered Showers. |
| Sunday Night...East Winds Around 5 Knots. Seas 2 To 3 Feet, Occasionally To 4 Feet. |
| Monday...East Winds Around 5 Knots. Seas Around 2 Feet. Scattered Showers In The Morning, Then Numerous Showers In The Afternoon. |
| Monday Night...Northeast Winds Around 5 Knots. Seas Around 2 Feet. Scattered Showers. |
| Tuesday...Northeast Winds Around 5 Knots. Seas Around 2 Feet. Numerous Showers In The Afternoon. |
| Tuesday Night...Northeast Winds Around 5 Knots. Seas 2 To 3 Feet, Occasionally To 4 Feet. Scattered Showers. |
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Area Forecast Discussion National Weather Service San Juan PR 454pm AST Thu April 24 2025 Synopsis A unstable weather pattern will be present from Friday into the upcoming weekend with widespread shower activity and thunderstorms. The best chance to observed generalize shower activity across eastern and interior sections. A northeasterly swell will reach the Atlantic waters resulting in a high risk of rip current on Sunday. .SHORT TERM...Tonight through Saturday... Mostly clear skies prevailed this morning across PR and the USVI. Cloudiness increased along the Cordillera Central during the afternoon. Showers developed by the afternoon across the interior, spreading into the rest of the coastal sections of PR. The maximum temperatures were noted near St Croix, with values in the mid-90s, while most coastal stations remained in the upper 80s or low 90s. Although a deep-layered trough is near the region, the lack of moisture will limit the risk of widespread showers today. Additionally, the lack of steering winds will create a slight risk of flooding rains along the interior sections of PR through this evening. Shower activity may end by this evening, leaving mostly clear skies. Low temperatures will reach the low or upper 50s along the mountains and valleys, while the coastal minimum temperatures will stop in the low 70s. An unstable and wetter pattern will gradually evolve by Friday afternoon, extending into the weekend. Additionally, deep moisture will be present by this time, which could promote better convection and a moderate to high chance of observing thunderstorms each afternoon. This weather scenario will make it likely to observe urban and small stream flooding each Friday and Saturday afternoon. Please continue to monitor the weather forecast as we approach the weekend. Long Term Sunday through Thursday... Model guidance continues to suggest a persistently wet and unstable pattern from late this weekend into early next week. Deep tropical moisture will stream into the region, with precipitable water (PWAT) values well above climatological thresholds, ranging from around 1.8 inches to about 2.2 inches from Sunday into mid- week, then gradually decreasing by the end of the period, Thursday. A mid to upper-level trough and an associated jet streak will enhance lift and divergence aloft, creating favorable conditions for showers and thunderstorm development. In addition, based on the latest models, 500 mb temperatures will remain around -8 degrees Celsius throughout the forecast period, maintaining upper-level instability and supporting deeper convection. At the surface, mainly easterly winds will dominate Sunday and Monday, gradually shifting from the northeast Monday night into Tuesday. According to the trend of the 925 mb temperatures, warmer than normal conditions are expected during the weekend and early next week, particularly in coastal and urban areas. A slight cooling trend is expected from Tuesday onward. The primary concern during this period is the increased risk of flooding. Current model trends indicate that the highest potential for moderate to heavy rainfall will occur between Sunday and Tuesday, which could lead to localized flooding, particularly in urban, low-lying, and mountainous areas. While there is still some uncertainty regarding the exact timing of the heaviest rainfall, the potential for impactful weather remains significant. Residents and visitors are encouraged to stay informed by monitoring official forecast updates as conditions may change quickly. Marine As the low weakens and dissipates to the north of our region, light and variable winds will prevail through Friday, then moderate easterly winds are expected to return by Friday night onward. Overall conditions should remain favorable for small craft, though localized hazardous marine conditions may develop near showers and thunderstorms, which are expected to become more active during the weekend into early next week. Beach Forecast There is a moderate risk of rip current across the northern exposed beaches of Puerto Rico. The risk of rip current will increase by Sunday into Monday due to a northeasterly wind flow across the local waters. Thunderstorm activity is forecast on Saturday into Sunday resulting in hazardous conditions along the coastal areas of the islands. .SJU WATCHES/WARNINGS/ADVISORIES... PR...None. VI...None. AM...None. |
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